A R T I C L E I N F OKeywords: government social media citizen engagement dialogic communication theory media richness theory emotional valence crisis management
A B S T R A C TDuring times of public crises, governments must act swiftly to communicate crisis information effectively and efficiently to members of the public; failure to do so will inevitably lead citizens to become fearful, uncertain and anxious in the prevailing conditions. This pioneering study systematically investigates how Chinese central government agencies used social media to promote citizen engagement during the COVID-19 crisis. Using data scraped from 'Healthy China', an official Sina Weibo account of the National Health Commission of China, we examine how citizen engagement relates to a series of theoretically relevant factors, including media richness, dialogic loop, content type and emotional valence. Results show that media richness negatively predicts citizen engagement through government social media, but dialogic loop facilitates engagement. Information relating to the latest news about the crisis and the government's handling of the event positively affects citizen engagement through government social media. Importantly, all relationships were contingent upon the emotional valence of each Weibo post. )is researcher at the School of Journalism and New Media, Xi'a Jiaotong University in China. She has been studying for information behavior and interaction, and information analysis on the new media.Richard Evans (richard.evans@brunel.ac.uk) is a Senior Lecturer at the College of Engineering, Design and Physical Sciences, Brunel University London, United Kingdom. His research interests are social media and organizational behavior, and knowledge management.
R&D professionals are the impetus behind technological innovation, and their competitiveness and capability drive the growth of a company. However, high-tech industries have a chronic shortage of such indispensable professionals. Accordingly, reducing R&D personnel turnover has become a major human resource management challenge facing innovative companies. This study combined importance–performance analysis (IPA) with the decision-making trial and evaluation laboratory (DEMATEL) method to propose an IPA–DEMATEL model. Establishing this model involved three steps. First, an IPA was conducted to measure the importance of and satisfaction gained from job satisfaction criteria. Second, the DEMATEL method was used to determine the causal relationships of and interactive influence among the criteria. Third, a criteria model was constructed to evaluate job satisfaction of high-tech R&D personnel. On the basis of the findings, managerial suggestions are proposed.
Preparing high-quality perovskite film with large grain size and fewer trap states is of vital importance in boosting the efficiency and stability of perovskite solar cells (PSCs). However, it is still difficult to obtain perfect MAPbI 3 films by antisolvent treatment so far because of the small grain size, pinholes, and numerous defects in perovskite layers. Herein, acetonitrile (ACN) was introduced into chlorobenzene (CB) antisolvent to modify the MAPbI 3 active layer. The results show that the ACN could control the ratio of the DMSO in MAI−PbI 2 −DMSO intermediate phase film effectively and thus manipulate the formation of MAPbI 3 film. Relatively high-quality perovskite films with larger grain size were obtained when we added 6% v/v ACN into CB antisolvent. Based on the ACN-modified MAPbI 3 film, the n-i-p planar device with the structure of FTO/SnO 2 /MAPbI 3 / spiro-OMeTAD/Ag yields the best power conversion efficiency (PCE) of 18.9%. It exhibited an enhancement of 16.6% in efficiency compared with the PCE of 16.2% for the control device. In addition, the device based on ACN-modified MAPbI 3 also presents improved stability in air atmosphere.
There has been a growing interest
in the development of efficient
flexible organic solar cells (OSCs) due to their unique capacity to
provide energy sources for flexible electronics. To this end, it is
required to design a compatible interlayer with low processing temperature
and high electronic quality. In this work, we present that the electronic
quality of the ZnO interlayer fabricated from a low-temperature (130
°C) sol–gel method can be significantly improved by doping
an organic small molecule, TPT-S. The doped TPT-S, on the one hand,
passivates uncoordinated Zn-related defects by forming N–Zn
bonds. On the other hand, photoinduced charge transfer from TPT-S
to ZnO is confirmed, which further fills up electron-deficient trap
states. This renders ZnO improved electron transport capability and
reduced charge recombination. By illuminating devices with square
light pulses of varying intensities, we also reveal that an unfavorable
charge trapping/detrapping process observed in low-temperature-processed
devices is significantly inhibited after TPT-S doping. OSCs based
on PBDB-T-2F:IT-4F with ZnO:TPT-S being the cathode interlayer yield
efficiencies of 12.62 and 11.33% on rigid and flexible substrates,
respectively. These observations convey the practicality of such hybrid
ZnO in high-performance flexible devices.
This article describes how a multidisciplinary problem-based learning (PBL) curriculum was established at the School of Stomatology at Wuhan University (WHUSS) in China for preclinical education in a seven-year dental school program. Based on positive feedback from a modified PBL program implemented in one discipline, a multidisciplinary PBL curriculum was established. PBL training for facilitators and students, development of resource materials, curriculum design, and case writing were done in a manner that is consistent with the characteristics and learning style preferences of Chinese dental students. About 80 percent of the lectures were kept in the new PBL program. The multidisciplinary PBL curriculum has been successful in helping dental students mentally construct an understanding of the interrelationship between dental knowledge and basic science concepts. The experience at WHUSS indicates that there are clear benefits for students in the PBL format. A benefit to faculty is that PBL tutorial facilitators were partly liberated from their traditional roles and developed additional skills for facilitating. However, conflict arises when PBL-trained students encounter the traditional exam-centered education system.
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